import sys

read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

class LazySegTree:
    def __init__(self, N, X_f, X_unit, A_f, A_unit, operate):
        self.N = N
        self.X_f = X_f
        self.X_unit = X_unit
        self.A_f = A_f
        self.A_unit = A_unit
        self.operate = operate
        self.X = [self.X_unit] * (N + N)
        self.A = [self.A_unit] * (N + N)

    def build(self, seq):
        for i, x in enumerate(seq, N):
            self.X[i] = x
        for i in range(N - 1, 0, -1):
            self.X[i] = self.X_f(self.X[i << 1], self.X[i << 1 | 1])

    def _eval_at(self, i):
        return self.operate(self.X[i], self.A[i])

    def _propagate_at(self, i):
        if self.A[i] == self.A_unit:
            return
        self.X[i] = self._eval_at(i)
        self.A[i << 1] = self.A_f(self.A[i << 1], self.A[i])
        self.A[i << 1 | 1] = self.A_f(self.A[i << 1 | 1], self.A[i])
        self.A[i] = self.A_unit

    def _propagate_above(self, i):
        H = i.bit_length() - 1
        for h in range(H, 0, -1):
            self._propagate_at(i >> h)

    def _recalc_above(self, i):
        while i > 1:
            i >>= 1
            self.X[i] = self.X_f(self._eval_at(i << 1),
                                 self._eval_at(i << 1 | 1))

    def set_val(self, i, x):
        i += self.N
        self._propagate_above(i)
        self.X[i] = x
        self.A[i] = self.A_unit
        self._recalc_above(i)

    def operate_range(self, L, R, x):
        L += self.N
        R += self.N
        L0 = L // (L & -L)
        R0 = R // (R & -R) - 1
        self._propagate_above(L0)
        self._propagate_above(R0)
        while L < R:
            if L & 1:
                self.A[L] = self.A_f(self.A[L], x)
                L += 1
            if R & 1:
                R -= 1
                self.A[R] = self.A_f(self.A[R], x)
            L >>= 1
            R >>= 1
        self._recalc_above(L0)
        self._recalc_above(R0)

    def fold(self, L, R):
        L += self.N
        R += self.N
        self._propagate_above(L // (L & -L))
        self._propagate_above(R // (R & -R) - 1)
        vL = vR = self.X_unit
        while L < R:
            if L & 1:
                vL = self.X_f(vL, self._eval_at(L))
                L += 1
            if R & 1:
                R -= 1
                vR = self.X_f(self._eval_at(R), vR)
            L >>= 1
            R >>= 1
        return self.X_f(vL, vR)

X_unit = (0, 0, 0)  # even, odd, sum
A_unit = (2, 0)


def X_f(x, y):
    return (x[0] + y[0], x[1] + y[1], x[2] + y[2])


def A_f(x, y):
    if y[0] <= 1:
        return ((x[0] + x[1] + y[0]) & 1, y[1])
    return (x[0], x[1] + y[1])


def operate(x, a):
    ev, od, su = x
    t, add = a
    if t == 2:
        if add & 1:
            return (od, ev, su + add * (ev + od))
        return (ev, od, su + add * (ev + od))
    if t == 1:
        ev, od = od, ev
    su = od + add * (ev + od)
    if add & 1:
        ev, od = od, ev
    return (ev, od, su)

N, Q = map(int, readline().split())
seg = LazySegTree(N, X_f, X_unit, A_f, A_unit, operate)
A = map(int, readline().split())
A = ((0, 1, x) if x & 1 else (1, 0, x) for x in A)
seg.build(A)

for query in readlines():
    if query.startswith(b'1'):
        L, R = map(int, query[2:].split())
        seg.operate_range(L - 1, R, (0, 0))
    elif query.startswith(b'2'):
        L, R, x = map(int, query[2:].split())
        seg.operate_range(L - 1, R, (2, x))
    elif query.startswith(b'3'):
        L, R = map(int, query[2:].split())
        ev = 0
        od = 0
        print(seg.fold(L - 1, R)[2])